Monitoring device



FIG. 1 is a top perspective view of a monitoring device in accordance with the present design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a rear elevation view thereof; and,

FIG. 7 is a right side elevation view thereof.

The broken lines in the figures show portions of the monitoring device which form no part of the claimed design. 

CLAIM The ornamental design for a monitoring device, as shown and described. 